Xcode 8 hangs / unresponsive when opening storyboard

Question

I\'ve recently upgraded to Xcode 8 and updated my project to Swift 3. All worked fine for a little while. Storyboard loading has always been slow (even when still running Xcode

Answer 1

Delete your derived data from /Users/{username}/Library/Developer/Xcode/DerivedData

(You can get exact path from) File -> Project Setting: or File -> Workspace Settings